{"title":"Prediction of New Genetic Recombination in Two Egyptian Cotton Crosses","authors":"A. Abdelmoghny","doi":"10.21608/AGRO.2021.65016.1251","DOIUrl":null,"url":null,"abstract":"Received 24/2/2021; Accepted 31/3/2021 DOI: 10.21608/agro.2021.65016.1251 ©2021 National Information and Documentation Center (NIDOC) THE SUCCESS of cotton breeding programme depends upon the available information about genetic potential of various genotypes, genetic variability, and heritability. While, selection reduce variability in the next generation by increasing phenotypic mean performance. The maximum and minimum range in F2 was observed to be wider than in F3 generation. While, the phenotypic mean performance of F3 was higher than F2 for all traits. Analysis of variance revealed highly significant (P≤ 0.01) differences between F3families which revealed greater genetic variation between these families. The excepted genetic variance of F3 families was larger than environmental variance and average variance within F3 families. Also, the intra-class correlation was more than 0.95%. These results indicated that the variability between families was larger than within families and selection between families could be more efficient than within families. The additive genetic variance plays a major role in controlling all the studied traits among two cotton crosses and had partial degree of dominance. Selection differential and response to selection were found to be positive for all traits, except micronaire value among two cotton crosses. Cross II has higher prediction of new recombinant falling outside parental range and exceeding F1 hybrid than cross I for most studied traits. The study reveals that judicious selection leads to improve mean performance in next generation. The most promising families should evaluate in multilocations yield trials.","PeriodicalId":42226,"journal":{"name":"Egyptian Journal of Agronomy","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Egyptian Journal of Agronomy","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21608/AGRO.2021.65016.1251","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"AGRONOMY","Score":null,"Total":0}
引用次数: 0
两个埃及棉杂交新基因重组的预测
2021年2月24日收到;2021年3月31日接受DOI:10.21608/agr.2021.65016.1251©2021国家信息和文献中心棉花育种计划的成功取决于各种基因型的遗传潜力、遗传变异性和遗传力的可用信息。而选择通过增加表型平均表现来降低下一代的变异性。观察到F2代中的最大和最小范围比F3代中的更宽。而F3在所有性状上的表型平均表现均高于F2。方差分析显示F3家系之间存在高度显著性差异(P≤0.01),这表明这些家系之间的遗传变异更大。F3家系的异常遗传方差大于F3家系内的环境方差和平均方差。此外,类内相关性超过0.95%。这些结果表明,家系之间的变异性大于家系内部,家系间的选择可能比家系内部更有效。加性遗传方差在控制两个棉花杂交组合的所有研究性状中起主要作用,并具有部分显性。除了马克隆值外,两个棉花杂交组合的选择差异和对选择的反应对所有性状都是正的。在大多数研究的性状中,杂交组合II比杂交组合I对新的重组体落在亲本范围之外并超过F1杂交体的预测更高。研究表明,明智的选择可以提高下一代的平均表现。最有希望的家族应该在多位置产量试验中进行评估。
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